文档介绍：------------------------------------------------------------------------------------------------ ——————————————————————————————————————有源电力滤波器多重因子自适应谐波检测法第 45 卷第 1期 2011 年1月电力电子技术 PowerElectronics , 王俊杰 1 ,姚钢2 ,郑益慧 1 ,王昕1( 1. 上海交通大学, 电工与电子技术中心, 上海 200240 ; 2. 上海交通大学,电气系,上海 200240 ) 摘要: 针对电网负载电流的低信噪比问题, 提出一种用于有源电力滤波器( APF )谐波检测的多重因子变步长自适应谐波检测方法。该方法以自适应噪声对消技术为基础, 通过引入动态因子, 增加相邻时刻误差信号的自相关值及静态因子对权值迭代的影响, 并利用误差信号的时间均值估计来控制步长更新,不但加快了动态响应速度,而且减小了低信噪比情况下的稳态失调, 增强了算法对畸变电流的抗干扰性。最后通过仿真及实验分析验证了该算法的有效性。关键词: 有源电力滤波器; 谐波检测; 自适应噪声对消中图分类号: TN713 文献标识码: A ------------------------------------------------------------------------------------------------ ——————————————————————————————————————文章编号: 1000-100X ( 2011 ) 01-0045-03 AMultipleFactorsVariableStep-sizeAlgorithmforAPFHarmonicDetection WANGJun-jie , YAOGang , ZHENGYi-hui , WANGXin ( ShanghaiJiaoTongUniversity , Shanghai200240 , China ) Abstract : Tosolvetheproblemaboutthelowsignaltonoiseratioofloadcurrent , amultiplefactorvariablestepadaptiveharmonicdetectionalgorithmispropo sedforactivepowerfilter ( APF ) .Utilizingtheadaptivenoisecancella-tiontechnology , thealgorithmisintroducedtoupdatethestepsizebasedontheestimationofth etimeaverageofer- , increasingtheerrorsignalfromtheadjacenttime-relatedvaluesandstat-icfac torsontheimpactofweightiterations , andusingestimatesoftheerrorsignaltocontrolthetimestepupdate , itmakethedynamicresponsespeedfast , andreducesthesteady-statelowSNRimbalance , andenhancestheanti-inter- : activepowerfilter ; harmonicdetection ; adaptivenoisecancellationtechnology FoundationProject : ------------------------------------------------------------------------------------------------ —————————————————————————————————————— Supportedby863NationalHigh-techDevelopmentPlan ( ); NationalNaturalScienceFoundationofChina ( ) 1